【正文】 it reaches a preset time, a slag discharge procedure will be initiated to discharge the slag. The lockhopper sequence has a cycle of 30min, the collection and dump are about 28min and 2min respectively.鎖渣罐位于氣化爐下部，鎖渣罐入口有兩個(gè)切斷閥（上鎖渣閥KV52208和中鎖渣閥KV52209），出口有一個(gè)切斷閥（下鎖渣閥KV52210）。兩個(gè)鎖渣罐進(jìn)口閥互為備用、交替受控動(dòng)作。在大部分時(shí)間里（即集渣階段），鎖渣罐入口閥打開、出口閥關(guān)閉。當(dāng)集渣時(shí)間到、進(jìn)入排渣階段時(shí)，鎖渣順序?qū)⑹芸氐逆i渣罐進(jìn)口閥關(guān)閉，鎖渣罐降壓后再打開鎖渣罐出口閥將存放在罐內(nèi)的渣排入渣池。在排渣期間，沖洗水閥KV52213打開，用沖洗水對鎖渣罐進(jìn)行沖洗。The lockhopper is located below the gasifier. The lockhopper inlet is provided with two block valves (upper lockhopper valve KV52208 and mid lockhopper valve KV52209). The outlet is provided with one block valve (lower lockhopper valve KV52210). The two lockhopper inlet valves are spare to each other and act alternatively under control. During most of the time (. slag collection period), the lockhopper inlet valve is open, and the outlet valve is closed. When the slag collecting time is over and going to the dumping time, the lockhopper sequence will close the lockhopper inlet valve, the lockhopper is depressurized before the lockhopper outlet valve is opened to discharge the slag to the slag sump. During slag discharge, the flush water valve KV52213 is open to flush the lockhopper with flush water.正常生產(chǎn)時(shí)，鎖渣罐的進(jìn)口閥和出口閥不允許同時(shí)打開。為防止操作錯(cuò)誤或控制器故障而發(fā)生意外，鎖渣罐進(jìn)口閥（KV5220KV52209）和出口閥（KV52210）在現(xiàn)場還設(shè)置有就地（氣路或油路）聯(lián)鎖。During normal operation, the lockhopper inlet valve and outlet valve are not allowed to open simultaneously. To avoid any accident due to operating error or controller failure, the lockhopper inlet valves (KV52208, KV52209) and outlet valve (KV52210) are furnished with local (air or oil line) interlock.鎖渣閥處理的的介質(zhì)為含渣熱水，其中包含大約20%的固體。渣的粒度和分布大約為：3～5cm 1%，1～2cm 5%，1cm 10%，～ 20%，＜ 64%，最大極限粒度 5cm。The lockhopper valve handles hot water that contains slag, which contains approximately 20% solids. The slag size and distribution are approximately: 3~5cm 1%, 1~2cm 5%, 1cm 10%, ~ 20%, 64%, the maximum size is 5cm..沖洗水閥處理的介質(zhì)為灰水，內(nèi)有少量固體（約200ppm），～。The flush water valve handles grey water which contains a small amount of solid (approximately 200ppm). Size distribution is ~.要求閥門為故障關(guān)型（FC），即在失去外部能源的情況下處關(guān)閉狀態(tài)。The valves type shall be Fail Closed (FC), . the valve shall be at closed position the in the event of power failure.鎖渣罐進(jìn)口閥和出口閥為垂直安裝，沖洗水閥為水平安裝。The lockhopper inlet valves and outlet valve are installed vertically, and the flush water valve is installed horizontally.在任何情況下，閥門從全關(guān)到全開位置或從全開到全關(guān)位置的行程時(shí)間應(yīng)小于10秒。Under any circumstances, the valve stroke time from full close to full open or from full open to full close shall be less than 10 seconds.1．2 閥門的設(shè)計(jì)條件 Valve Design Conditions（1） 閥門為全通徑金屬硬密封型球閥，球體開孔直徑應(yīng)符合API 6D標(biāo)準(zhǔn)。(1) The valve shall be full bore metallic hard seal type ball valve. The bore diameter shall conform to API 6D standard.（2） 閥門應(yīng)在最大壓差（一側(cè)為最大工作壓力、另一側(cè)為大氣壓）的情況下保證可靠密封。其中，上、中鎖渣閥和沖洗水閥要求雙向密封，下鎖渣閥要求單向密封。閥門的泄漏量應(yīng)同時(shí)滿足ANSI/FCI 702的Class V級密封和MSS SP61泄漏標(biāo)準(zhǔn)。(2) The valves shall maintain reliable seal under the maximum differential pressure (maximum working pressure on one side and atmospheric pressure on the other side). The upper and mid lockhopper valves shall have bidirectional flow direction seal, and the lower lockhopper valve and flush water valve shall have oneway seal. The valve leakage shall conform to ANSI/FCI 702, Class V seal and MSS SP61 leakage standard.（3） 閥門的開關(guān)次數(shù)頻繁（每30分鐘開、關(guān)一次），工作條件惡劣，高壓（）、高溫（110℃）和低壓（大氣壓）、常溫（57℃）交替變化，閥門設(shè)計(jì)應(yīng)保證至少能工作100000個(gè)壓力和溫度變化操作循環(huán)，即工作狀態(tài)下的開/關(guān)次數(shù)應(yīng)≥100000次。賣方應(yīng)根據(jù)過去的使用經(jīng)驗(yàn)，提出在正常操作工況下不需對閥球、閥座進(jìn)行更換或修理的閥門連續(xù)開/關(guān)次數(shù)的保證值。此數(shù)值為評標(biāo)的重要數(shù)據(jù)并將作為保證值寫入合同中。(3) The valves operate with high onoff frequency (onoff every 30min), at severe working conditions with alternating high pressure (), high temperature (110℃) and low pressure (atmospheric pressure) and normal temperature (57℃). The valves shall be designed with at least 100,000 pressure and temperature cycles, . on/off times during working condition shall be at least 100,000 times. Seller shall, based on its previous experiences, provide the guaranteed value of continuous on/off times for normal operating case without replacement or repair of the ball and seat. This value will be a key criteria during bid evaluation and will be incorporated in the contract as a guaranteed value.(4) 鎖渣閥門垂直安裝，設(shè)計(jì)時(shí)必須考慮球體自重對閥桿的對中性的影響，以保證閥桿及填料的長期密封及壽命。沖洗水閥水平安裝，設(shè)計(jì)必須考慮球體自重對閥座密封圓周面的影響。(4) The lockhopper valves are installed vertically. Considerations must be taken during the design for the impact of the ball weight on the centering of the stem so as to ensure longterm seal and service life of the steam and packing. The flush water valve is installed horizontally. Considerations must be made during the design for the impact of the ball weight on the seal circumference of the seat.(5) 球體與閥座的密封面應(yīng)為寬闊的球面，以保證閥座不因承受過大的壓強(qiáng)而造成損壞。且不因閥座上有輕度劃痕而造成密封的破壞。在報(bào)價(jià)時(shí)，賣方應(yīng)提供密封面寬度、密封面積大小、密封面承受壓強(qiáng)以及設(shè)計(jì)選用材料的允許使用壓強(qiáng)等數(shù)值，以供買方確認(rèn)。(5) The seal face between the ball and seat shall be a wide spheric face so as to make sure the seat is not damaged due to excessive pressure, and the seal is not damaged due to slight scratching on the seat. Seller shall provide the seal width, size, pressure bearing capacity of the seal face and allowable service pressure of the material selected by design in its proposal to Purchaser for approval.(6) 閥座設(shè)計(jì)應(yīng)具有在開關(guān)過程中對球體表面的自清理功能。(6) The valve seat shall be designed with a self cleaning feature for the ball surface during on/off.(7) 在閥門設(shè)計(jì)中應(yīng)具有減少閥門小開度時(shí)對閥口沖刷的有效措施。(7) The valve shall be designed with measures to minimize wear of the port when the valve is at small opening.(8) 閥桿密封應(yīng)有雙密封設(shè)計(jì)：即防止固體顆粒進(jìn)入填料函的閥桿金屬密封和填料密封。(8) The steam shall have double seal design: . metal seal and packing seal to prevent the solids from entering the packing box.(9) 支架應(yīng)牢固地焊接在閥體上，以保證執(zhí)行器的對中和穩(wěn)定性。(9) The support shall be welded on the valve body in a secured manner to ensure centering and stability of the actuator.(10) 閥座彈簧應(yīng)具有防灰渣堵塞結(jié)構(gòu)，并易于清洗。（10）The seat spring shall be furnished with mechanism to prevent slag plugging and shall be easy to clean.(1